The National Stock Exchange (NSE) on July 21, 2026, has notified members that the existing Futures & Options (F&O) market data broadcast parameters for NNF users (5-depth, 1-second refresh) will be discontinued from the mock trading session scheduled on September 5, 2026.
Members must migrate to the new broadcast parameters introduced earlier to support the enhancement of token-level cumulative traded volume data type from 4-byte Unsigned Integer to 8-byte LONG. The Exchange has clarified that no further extension of the coexistence period will be granted, while all other provisions of the earlier circulars remain unchanged.
Please refer to the document attached below for more details.
[Circular Ref. No: 53/2026]
